Watch List notes:

KINGS of MACEDON. Antigonos I Monophthalmos. As Strategos of Asia, 320-306/5 BC. AR Tetradrachm (28mm, 16.87 g, 1h). In the name and types of Alexander III. Sidon mint. Dated RY 4 of an uncertain king (306/5 BC). Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; in left field, Δ (date) above M; ΣI below throne. Price 3526; Newell, Dated 70 (dies XXXIII/α); DCA 877. Near EF, minor marks, slight die wear on obverse (typical for issue, die was used for four years). Very rare, only one in Pella database, four in CoinArchives.

From the Colin E. Pitchfork Collection.